Sturdy to use:these finger picks are main made of stainless steel, easy to break, no pungent smell, appropriate bending amplitude and tightness can fit your well; The guitar thumb picks are made of celluloid material, which is comfortable to use, providing you with nice protection for your and fingernails Thoughtful design:this open design which means you can feel the strings for extra control, they are exquisite gifts for your friend who likes guitar or bass player, or for personal use; Please 't get discouraged if you can' them the first time you put them on, and do more practice About size size:you have to fit the metal picks to each finger by bending the openings, the metal is pretty stiff, which is good for retain their shape; Please be careful of the size, this size is suitable for most adult but please confirm the size of your before ordering Designed for practice:these guitar picks are mainly applied to protect from pain and sweat, making the sound of the instrument fuller and more realistic; Practical accessories for helping practice guitar and improving your performance Widely applicable:these guitar thumb and finger picks can be applied in playing electric guitar, acoustic guitar, classic guitar, bass, banjo and so on, which help you quickly and effectively the sound quality stable, strengthen guitar bass and graininess Colour:Silver & Blue-Black Material:stainless steel + celluloid Package Contents: 8 * index finger picks 4 * thumb picks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.